Preheat oven 325 degrees.Sprinkle 1/2 cup pecans and 1/4 cup chocolate chips over bottom of crust. Whisk brown sugar and next six ingredients in medium bowl. Pour into pie crust. Sprinkle remaining pecans over filling. Bake until filling is set in center about 40 minutes. Cover the edges of pie crust with aluminum foil or a pie shieild about halfway through baking to prevent edges from getting too brown.